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Finding the Right Prostate Cancer Diet

Studies Point to Protective Role of Vegetables, Risky Role of Eggs
By
WebMD Health News
Reviewed by Louise Chang, MD

Feb. 15, 2008 (San Francisco) -- Men: Take off the skin!

That's the advice of U.S. researchers who found that poultry and eggs double the risk of prostate cancer progression.

"But when we broke it down, the increased risk was confined to poultry with the skin on and eggs," says June M. Chan, ScD, of the University of California, San Francisco.

The study of about 1,250 men treated for prostate cancer also showed that orange and yellow vegetables, such as squash, yams, and carrots, and cruciferous vegetables, such as broccoli, cut the risk of recurrence by about half.

Fruit and fish did not appear to help prevent prostate cancer from returning, Chan tells WebMD.

The study results were based on data from CaPSURE, a national registry of men with prostate cancer.

Though the findings need to be confirmed in other studies, Chan says that they held up even after the researchers took into account other factors -- such as age, weight, and exercise -- that can affect prostate cancer risks.

"If you eat chicken or poultry, eat it without the skin," she advises.

Pomegranate Juice Protective

The study was presented at the Genitourinary Cancers Symposium, presented by the American Society of Clinical Oncology (ASCO) and two other cancer care organizations.

Other research reported at the meeting pointed to the benefits of pomegranate juice and lycopene in preventing prostate cancer progression.

Five years into a study testing the benefits of pomegranate juice, UCLA researchers report that an 8-ounce glass a day continues to keep prostate cancer recurrence away.

UCLA researcher Allan Pantuck, MD, and colleagues enrolled 46 men in a study funded by the owners of POM Wonderful Co., the maker of the pomegranate juice used in the study. The men all had rising PSA (prostate-specific antigen) levels after cancer treatment; all drank 8 ounces of pomegranate juice every day.

As a measure of progression, the researchers looked at the time it took PSA levels to double. The faster PSA levels double, the sooner a man is likely to see prostate cancer return.

Original results of the study, published in 2006, showed that the men's overall PSA doubling time was nearly four times slower after they began drinking pomegranate juice.

Pantuck says that when the study was scheduled to end, a lot of the men didn't want to give up the pomegranate juice. So its design was amended and men were allowed to continue consuming their purple drink.

As of August 2007, 17 men had been followed for an average of 58 months. Their PSA doubling time is now nearly five times slower than before they started drinking the juice, Pantuck tells WebMD.

"There's a very durable improvement," he says.

The researchers are now enrolling men in a major clinical trial that will pit pomegranate juice against placebo.

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